blizard



U. E. BLIZARD.

VEN'HLATED SIGHT RIB FOR FIREARMS.

7 APPLICATION mco nmzs. 1919.

Patented Nov. 25, 1919.

3 SHEETS-SHEET l- C, E. BLIZARD.

VENTILATED SIGHT RIB FOR FIREARMS. I APPLICATION FILED APILZB. 1919.

1,323,149. Patented Nov. 25,1919.

3 SHEETSSHEET 2.

InmiIgiln 0. E. BLIZABD.

VENTILATED SIGHT RIB FOR HREARMS.

APPLICATION'HLED APR. 26, me.

Patented Nov. 25, 1919.

3 SHEETS-SHEET 3- M. 44444 a My tion-pn t'he line 5-5 of Fig. 1.

Isl L line PAT NT or ce.

CHABLES'EIBLIZARDI or NEWiHAVEN, CONNECTICUT, ASSIGNOR To WINCH STERREPEATING Amvf's CO.-,i,OF..NEW HAVEN, CONNECTICUT, A CORPORATION.

tute part of this application, andjrepresent,

. Figure 1 a broken view in right and side elevation of ataikedownfirearm, embodying my invention. f; I

Fig. 2 a corresponding view showingv the barrel and magazine of the arm'sepanated from the receiver thereof. j. t

Fig. 3 an enlarged broken view in side'lelevation showing one of thesliding supports of the rib as. it rests upon the barrel;

l 4 a broken reverse plan'view off'the same portion of the rib showingthe'sliding umaprt; 7

F g ii a view in vertical transve'rse'sec- Fig.6 broken view of hebarrels in side elevation andQtheQsight-rib in longitudinalcentralshowingthe. key by .lmans of which the barrelandthe' rib areprevented y from relative.

Pl 'nwgof that 631 key f stanaardflbutithe e -pin be n h i'inlacayi Ei.a detachedvie in side of, the ke y.-, f f

fi- 13413 Qfz'gElg' L. Fig. 14 a broken View in SIdG,

tion of h. es e i signs. e enfieagaands .cs pecification of' LettersPatent.

lens-medialWa saw t Y unNTf a D SIGHT-RIB FOR FIREARMS.

Patented Nov. 25), 1919.

llfiplieation med April 26, 1919. Serial No. 292,939.

Fig. 16 a detached plan View of -the sightriib extension. f i

Fig. 17 a detached view thereof in side elevation. Fig. 18 a detachedView thereof in front elevation 7 My invention relates to an improvement"in ventilated sight-ribs for firearms, the oh- I ject being to providea simple, reliable and efficient construction in which the effect uponthe rib due to the contraction and expansion [of the. barrel isminimized, and in which As herein shown, my invention is applied to atakedown shot-gun, but I would have it understood that my invention isneither limited to takedown guns nor -to shotguns, but is applicable tosolid frame guns and to rifles as well as to shot-guns.

Asshown, the ventilated sight-rib 14 is provided throughout its lengthwith a series 'of depending. integral supports 15 arranged in line withthe rib and barrel l6 and all -having their lower faces concaved inconformity with the curvature of the barrel so as to adapt them. to restthereupon. All of the said supports 15 have their lower faces formedwith undercut or dovetail longitudinal slots 17 receiving upstanding,integral dovetail lugs 18 arranged in line upon the Iftop' ofthe barreland spaced in correspondiience with the spacing of the said supports 15.All of the supports are slotted throughouttheir-length except the frontsupport 19 Tithe undercut slot 20 of which has its forgWaId end leftsolid as at 21 for the sake of appearance and finish.

"'Th-e slotted supports 15 and upstanding ,.l-ugs 18 couple the rib andbarrel against all linove nent except lon itudinal movement in ch theends of the arr-e1 are free to move such a rib may be, applied to atakedown gun independently of the rib and vice versa, it beingunderstood that the repeated firing of the gun heats the barrel so as tocause its elongation which would result in buckling unless provisionwere made for the barrel to elgngate and contract independently of therr In order to prevent the rib from being longitudinally displaced withrespect to the barrel owing to the shock of recoil, it is necessary torigidly fasten the rib and barrel together at some point. Heretofore,this has been done at either the muzzle-end or breech-end of the barrel.Under my invention I rigidly attach the rib and barrel toether at somepoint between the ends of the arrel so that the ends of the barrel onopposite sides of this point of rigid attachment may be free to contractand expand under the rib, while the rib at this fastening point will bebodily moved but within exceedingly narrow limits, with the movement ofthis particular part of the barrel as the entire arrel contracts andexpands.

Preferably and as herein shown, I permanently attach the rib and barrelmidway between vthe ends of the barrel. For this purpose, I utilize thecentral support 22 which in addition to being formed with a longitudinalundercut slot 17 ,is formed with a deep slot 23 leading out of the topof the slot 17 and extending at its ends into the lower face of the ribas at 24. The slot 23 provides for the reception of a key 25 secured tothe support 22 by means of two key-pins 26 passing through the saidsupport, and through holes 27 in the ends of the key the lower face ofwhich is formed with a transverse slot 28 adapting it to fit over theends of the dovetail lug 29 which corresponds to the lugs 18 aforesaid.The key 25 is held by the ends of the lug 29 against longitudinalmovement with respect to the barrel and by the pins 26 againstlongitudinal movement with respect to the rib, whereby the rib andbarrel are fastened togethcr, there being no longitudinal or slidingmovement between the barrel and rib or vice versa at this point.However, the ends of the barrel on the opposite sides of the lug 29 areleft entirely free to have relative longitudinal movement with respectto the rib which is also entirely free to have relative longitudinalmovement with respect to the barrel on the opposite sides of this point.As already stated, the entire rib has bodily movement with that portionof the barrel where this fixed connection is made, the amount of suchbodily movement of the rib depending upon the point where this fixedconnection is made and increasing as the point is moved forward. a

The other outstanding feature of my invention is an interchangeablesight-rib extension 30 having dovetail or beveled edges adapting it tobe entered into a longitudinal dovetail slot 31 in the top of thereceiver 32, the rear end of the extension 30 being broadened as at 33and rearwardly beveled as at 34 to form a head. The opposite edges ofthe head are slightly raised to form what may be termed sighting-ridges35, 35, which are parallel and extend with the length of the extensionand which are substantially in line with the respective edges of theventilated sight-rib 14. Between these ridges, I form a shallowsight-notch 36 the ends of which merge into the bevel 34 of the head andthe upper face of the extension 30. When the sight-rib extension ismounted upon the top of the receiver, the forward end of the extensionis flush with the forward end thereof so that when the gun is puttogether it abuts against the rear end of the sight-rib 14 with which itis exactly in line. I thus provide for furnishing a takedown gun with aventilated sight-rib. But I do not limit the use of my improvedinterchangeable sight-rib extensions to takedown guns as they are alsoapplicable to solid-frame guns whether rifles or shot-guns. In a broaderview of this phase of my invention, it enables guns provided withventilated sight-ribs to have their sight-rib'extensions interchanged tomeet the idiosyncrasies of the consumer so that any given gun may bemanufactured in large numbers and converted to meet the requirements ofthe consumer without any other change whatever, thus effecting a greatsaving to the manufacturer as well as to the consumer.

As thus mounted the sight-rib 14 is almost entirely insulated from thebarrel, is substantially unaffected by the longitudinal contraction andexpansion thereof and remains comparatively cool when the barrel becomeshot under the repeated firing of the Although I have shown myimprovement as applied to a takedown shot-gun, it is not limited totakedown guns, nor to shot-guns, but may also be applied to solid frameguns and to rifles, its characteristic feature being the fixedconnection of the rib to the barrel between the ends of the barrel,preferably, though not necessarily, midway the length thereof, so thatthe barrel on the opposite sides of this point of fixed connection isfree to contract and expand with respect to the rib and so that the ribis free to contract and expand with respect to the same.

The other characteristic feature of my invention is an interchangeablesight-rib extension mounted upon the receiver so as to aline withthesight-rib proper.

I claim 1. In a firearm. a ventilated sight-rib rigidly attached at onepoint only to the top of the barrel between the ends thereof to permitthe ends of the barrel to expand and contract. on opposite sides of suchattachment without disturbing the rib.

2.111 a firearm, a ventilated sight-rib rigidly attached to the top ofthe barrel at a point between the ends thereof and so attached theretoat other points thereon as to have longitudinal freedom of relativemotion.

3. A firearm having a ventilated sightrib rigidly attached to the top ofthe barrel at one point only between the ends thereof and movablyattached thereto by longitudinal dovetails distributed throughout thelength thereof so as to permit longitudinal freedom of relative motionbetween the barrel and rib except at the point of their rigidattachment.

4:. A firearm having a ventilated 'sightrib rigidly attached at onepoint only to the top of'tlie barrel by a pin and key fastening locatedbetween the ends thereof, and slidably attached to the barrel by aplurality of longitudinal dovetail fastening members, whereby the endsof the barrel are permitted to expand and contract without disturbingthe rib.

5. In a firearm, a ventilated sight-rib havring a plurality of standardson its under surface, one of these standards, located at a point betweenthe ends of the rib, having a removable rigid attachment to the barrel,and the other standards having longitudinally slidable attachmentthereto.

6. In a firearm, a ventilated sight-rib having a plurality of standardson its under side, one of these standards, located between the ends ofthe rib, having a slot for the reception of a key pinned thereto, incombination with a lug formed on the barrel, dovetailed longitudinallyfor engagement with the said standard and adapted to hold the said keyagainst longitudinal motion relative to the barrel.

7. In a single barrel firearm, the combination with the receiver and thebarrel thereof, of a ventilated sight-rib located upon the top of thesaid barrel, and'an interchangeable sight-rib extension mounted upon thereceiver in line with the said ventilated sight-rib.

8. In a single barrel take-down firearm, the combination with thereceiver and the barrel thereof, the said parts being adapted to bemanually put together and taken down; of a ventilated sight-rib locatedupon the top of the said barrel, and an inter-.

changeable sight-rib extension mounted upon the receiver in line withthe said ventilated sight-rib.

9. In a single barrel firearm, the combination with the receiver and thebarrel thereof, of a ventilated sight-rib located upon the top of thesaid barrel. and an interchangeable sight-rib extension mounted upon thereceiver in line with the said ventilated sight-rib, the said receiverand sight-rib extension being respectively formed with the components ofa dovetail joint.

10. In a single barrel firearm,,the coinbination with the receiver andthe barrel there'- of, of a ventilated sight-riblocated u'ponthe. top ofthe barrel, and an interchangeable sight-rib extension mounted upon thereceiver and formed with two longitudinal terchangeable sight-ribextension mounted upon the receiver and extending above the same intothe plane of the said ventilated sight-rib with which it is arranged inline.

12. In a single barrel take-down firearm, the combination with thereceiver and the barrel thereof, the said partsbeing adapted to bemanually put together and taken apart, of a ventilated sight-ribremovably applied to the top of the barrel, and an interchangeablesight-rib extension mounted upon the receiver and rising into the planeof the said ventilated sight-rib, the rear end of the ven-' tilatedsight-rib and the forward end of the sight-rib extension abuttingsubstantially in the plane in which the breech-end of the barrel and theforward end of the receiver abut when the gun is assembled.

13. In a takedown firearm, a sight-rib rigidly attached to its barrelat'a point between the ends thereof and having other attachments theretopermitting longitudinal relative motion; and a sight-rib extensionmounted on the receiver of the said firearm, the said sight-ribextension being in alinement with't-he sight-rib when the arm isassembled.

14. In a firearm, a sight-rib attached to the barrel by a plurality oflongitudinal dovetails distributed throughout the length of the barreland by a pin and key fastening located between the ends of the barrel,in combination with a sight-rib extension attached to the receiver ofthe arm and formed with two upstanding longitudinal sightingridges.

15. In a firearm, a sight-rib having a plu rality of standards on itsunder side, one of these standards, located between'the ends of thebarrel, having a slot for the reception of a key, in combination with alug formed on the barrel, dovetailed longitudinally for engagement withthe said standard and adapt rib extension attached to the receiver'ofthe arm, formed with a rearwardly broadening and downwardly sloping rearportion and with two upstanding longitudinal sightingridges.

16. In a takedown' firearm, a sight-rib rigidly attached to the top ofthe barrel thereof at one point only between the ends of the said barreland having longitudinally slidable attachment relative to the saidbarrel at a plurality of points thereon, in combination with a sight-ribextension mounted on the receiver of the arm and having a rearwardly anddownwardly sloping, broadened rear portion formed with two longitudinalsighting-ridges and alining with and abutting against the said sight-ribwhen the arm is assembled.

g In testimony whereof I have signed (his specification in the presenceof two subscribing witnesses.

CHARLES E. BLIZARI).

WVitnesses:

THOMAS C. JOHNSON, DANIEL H. VEADER.

